Congrats on your news, how exciting.

As for those nasty co-workers,

you will learn not to listen to them or put up with their comments. Someone always has something negative to say. As other posters have said, it's none of their business and everything that is going on with your body is between you and who ever you have in your life. The person who said something about your bump at 11 weeks (cant' tell then anyways), I had a lady that I hardly knew come up and rub my belly (only because she knew I was pregnant) I mean WTF??? People will probably think it is okay to touch you as well so I made a sign for my desk saying "Baby on Board" "Hands off the Belly".
I hope you have a happy and healthy 9 months.
